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To ALL WHOM 1T MAY coNoERN:

Be it known that I, B. M. ESTERLE, of the city and county of San Francisco, and State of California, have invented a new and useful `Improvem'ent on Street-'Railroad Tracks, of which the following, with accompanying drawings, is a full and exact description.

The object of my improvement is to prevent railroad carsfrom leaving their tracks, and also the t`oo great useof the tracks by other vehicles, while at the same time it better enables them to leave or enter the tracks at will. In the accompanying drawings- Figure 1 represents the appearance in perspective of a street-railroad track with my improvement attached.

Figure 2 represents the same geometrically with different modes of attachment to the track, the improvement A being either aiiixed by bolts F F to track C, or rolled out with the rail originally, as shown more fully in the upper rail of fig. 1. The improvement may also be made in solid form, as indica-ted by piece lettered A, 'or more economically when of greater length in a. hollow form, as in piece lettered B. The improvement also is not confined toa-ny dimensions and length, but may 'be from three inches upward, substantially as shown in the drawings.

Figure 3 represents a sectional view of my-improved street-railroad track cut transversely.

It will be observed that tle outer rim of rail marked E inelines inward, and the improvement B presents an incline outwards', both inclining to the'groove, so that the two act simultaneously on the two wheels, thereby throwing them in proper position. To illustrate, in figs. 1 and 2, suppose the car to leave-the direct line at points marked G G, the-,flange of car-wheel D strikes the improvement A or B at points marked II, which acts as a wedge, and, in conjunction with incline E acting on corresponding wheel, serves to force the wheels to their proper position in the grooves of the rails.

I do not claim the incline E only as used in connection with my improvement, as the same may have been in use by others. v v

What I claim, and desire to seeureby vLetters Patent, is The railroad rail provided with alternate inclines A and B, substantially as and for the purposes herein set forth. Y y

In witness whereof'I have hereunto subscribed my name this twenty-ninth day of Juno, A. D. 1865.

BENJAMIN M. ESTERLE. [Snom] Witnesses:

ALFRED Barstow, Gro. H. BAKER. 

